Tagar commented on issue #6674: Fix NPE at 
io.druid.cli.CliInternalHadoopIndexer (fixes #6673)
URL: https://github.com/apache/incubator-druid/pull/6674#issuecomment-442581984
 
 
   Got it. Thanks @jihoonson 
   
   So this check isn't possible as verify() at 
   
https://github.com/apache/incubator-druid/blob/d5633dd396a5cd16f98cb0e65d24ff5f8d6b33c3/indexing-hadoop/src/main/java/org/apache/druid/indexer/HadoopDruidIndexerConfig.java#L580
   
   doesn't have a way of knowing if this spec is for `Cli Hadoop indexer` or 
for `hadoop index task` ?
   
   That NPE error I described at 
https://github.com/apache/incubator-druid/issues/6673 is very cryptic and only 
way to know that `metadataUpdateSpec` was missing is to look at the source code.
   
   

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